try to add testunbound

PHPConversionTest.php

public function testUnbound()
    {
        $xml = '
           <xs:schema targetNamespace="http://www.example.com" xmlns:xs="http://www.w3.org/2001/XMLSchema">
               <xs:element name="packet">
                <xs:complexType>
                    <xs:complexContent>
                        <xs:extension base="RequestPacketType">
                            <xs:sequence>
                                <xs:choice maxOccurs="unbounded">
                                    <xs:element name="reseller" type="ResellerInput"/>
                                </xs:choice>
                            </xs:sequence>
                        </xs:extension>
                    </xs:complexContent>
                </xs:complexType>
            </xs:element>
               <xs:complexType name="ResellerInput">
                   <xs:choice maxOccurs="unbounded">
                       <xs:element name="add" type="ResellerAddInput"/>
                   </xs:choice>
               </xs:complexType>
               <xs:complexType name="ResellerAddInput">
                    <xs:sequence>
                        <xs:element name="gen-info" type="ResellerAddGenInfo"/>
                    </xs:sequence>
	            </xs:complexType>
	            <xs:complexType name="ResellerAddGenInfo">
                    <xs:annotation>
                        <xs:documentation>Reseller adding data</xs:documentation>
                    </xs:annotation>
                    <xs:sequence>
                        <xs:element name="cname" type="string" minOccurs="0"/>
                        <xs:element name="pname" type="string"/>
                        <xs:element name="login" type="string"/>
                        <xs:element name="passwd" type="string"/>
                    </xs:sequence>
	            </xs:complexType>
	            <xs:simpleType name="string">
                    <xs:restriction base="xs:string">
                        <xs:whiteSpace value="collapse"/>
                    </xs:restriction>
                </xs:simpleType>
                <xs:complexType name="RequestPacketType">
                    <xs:attribute name="version" type="string"/>
                </xs:complexType>
	       </xs:schema>
';
        $items = $this->getClasses($xml);
        print_r($items);
        exit;
    }